You are advised to read an event's details carefully, as there are several variations. In some, the racetrack lends a vehicle to each competitor, while in others you must supply your own vehicles. Some events allow a gang to control more than one vehicle. Some have restrictions in terms of the engine size, chassis type, or weapons that are allowed.
Scheduling
Depending on the type of event, one of these scheduling schemes will be used:
falls within this category.
There are some extra options that are only available in timetrials, not in other event types:
(1) 'Reset!' - You'll find this by right-clicking your car: this sets your car back to the starting grid and (if the car was supplied by the racetrack) you get a shiny new one. (Ok, not very shiny.)
(2) 'Change Driver!' - again, right-click your car in-game. This allows you to replace your current driver with another one from your gang (perhaps your driver isn't feeling too well after hitting a barrier at 80mph). The car must be stopped before changing drivers.
Races
Make sure to log in to these before the official start time, otherwise the server will control your car until you arrive. If the race had no qualifiers, and you don't turn up within the first 30 game seconds, then your cars will be removed. Races don't have a fixed time limit, but are based on number of laps. As each car finishes the race, it is removed from the game. If you have more than one character in your vehicle, you can switch driver by opening the car's 'Manage' panel and then right-clicking on the character who you want to take over driving. The vehicle does not need to be stopped to do this.
Deathraces
These are races in which weapons are allowed. In all other respects, they are the same as races. OK, perhaps a little more dangerous.
Combats
Arena Combats
These are scheduled, in-town events that are carried out between two opposing teams. When multiple gangs are involved, they are randomly assigned to the teams.
In order to determine the final rankings of an arena combat, a points system is used. You get points for damaging cars from the opposing team. You lose points for damaging cars from your own team. The amount of points scored is basically the damage amount, multiplied by the combat rating of the car you have damaged.
Combat rating is therefore a sort of handicapping factor which makes arena combats more challenging - you can't just enter with a massively armed vehicle and expect to cruise to victory. Note that any type of damage is included -- this is not just from weapon fire but also from crashing into the enemy. Also, whoever has most recently damaged a car will also gain points if that car subsequently crashes into an obstacle, even if that happens 10 seconds afterwards. Dropped weapons such as mines and spikes also score points.
Finally, you should also be aware that an arena combat runs for 120 game moves, or until all cars from one team have resigned. If the latter, then all non-resigned cars from the winning team have their points total multiplied by 1.5 before the combat ends and the prizes are distributed.